You can entry on the race day for 5k and 10k. Place: Race Day Entry Boose Time: 11:00-14:30 Starting Time: 5k 15:15, 10k 15:17 Fee: 5k \3,000 10k \4,000 http://www.challengerun.jp/top/
Where is National Stadium? JR Sendagaya, Oedo-sen Kokuritsukyogijyo